RU8418U1 - HYDRAULIC PUMP WITH PNEUMATIC DRIVE - Google Patents

Abstract

A hydraulic pump with a pneumatic drive, containing two check valves and a pneumatic cylinder with a built-in mechanism for automatic control of the reciprocating movement of a one-way rod, located in a hydraulic housing connected to the pneumatic cylinder, characterized in that a thickening in the form of a piston with a cross-sectional area is made at the end of the rod exceeding the cross-sectional area of the rod, as a result of which a hydraulic cylinder is formed in the hydraulic body, the piston cavity of which is connected through a check valve with a suction hydraulic line, and the rod cavity is connected to a pressure hydraulic line and through a check valve installed in the thickening of the rod to the piston cavity.

Description

HYDRAULIC PUMP WITH Pneumatic Actuator

Suggested usefulness; model Hydraulic pump with P: 11; rmo fivodpm oTi ocHTcs to region 1 :: mass production, and: - m- :; to volumetric hydraulic pumps and can be used in volumetric hydraulic equipment drives.

Known hydraulic pumps of rotational motion with a drive, mainly from electric motors. The design and operation of the known pumps are described in the book under the editorship of the days TM Bashta Volumetric pumps and hydraulic motors of hydraulic systems, Engineering, Moscow, 1974, p. 53, fig.

The disadvantages of hydraulic systems with well-known pumps are the need for an electric power source, start-up and re-bridging and protective electrical and hydraulic equipment, low efficiency and pump resource consumption at partial and zero fluid flow rates in the hydraulic system.

The closest usable modem belts are pneumatic-driven hydraulic pumps. For example, SC HYDRAULIC ENeiNEERING CORP. Clft (see Appendix copy of the company’s catalog), containing a pneumatic cylinder with a built-in mechanism for automatic reciprocating movement of the piston with a cylinder forming a plunger with a hydraulic housing a pair, the cavity of which communicates through one non-return valve with a suction hydraulic line. and through a second non-return valve, with a pressure hydraulic line.

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The disadvantages of the known device is the low efficiency due to unproductive consumption of compressed air during suction, when useful work is not performed, as well as the instability of the fluid supply to the pressure hydroline, since the fluid supply occurs once per double stroke of the pump piston. The proposed technical solution eliminates these shortcomings.

The task. The claimed useful shodel is aimed at solving it, is to create a hydraulic pump design with a pneumatic drive, which provides an increase in efficiency and stability of the fluid supply to the pressure hydraulic line.

To solve this problem, a hydraulic pump with a pneumatic actuator containing two check valves and a joint venture pneumatic cylinder has a built-in mechanical day: a tire for automatic control of the reciprocating movement of a one-way rod located in a hydraulic housing connected to the pneumatic cylinder, at the end of the rod there is a thickening and a piston type, with a piston cross sections, twice the rod cross-sectional area, as a result of which a hydraulic cylinder is formed in the hydraulic housing, the piston cavity of which is connected through a return pan with suction gidroliniey.a spindle cavity is connected with the first pressure line and via a check valve mounted in the stem thickening, - a plunger cavity.

Comparative analysis with the prototype shows that the inventive device differs from the prototype in the rod design, which makes it possible to form a hydraulic cylinder in a hydraulic housing, as well as the connections of the cavities of this hydraulic cylinder.

The drawing simplified depicts the proposed design of a hydraulic pump with pnpmonmonrigd.

The pump consists of a pneumatic cylinder located: with the mechanism 2 for automatically controlling the reciprocating movement of the piston 3, connected to the piston rod 4 having a Htt thickening end, in which the check valve 5 is placed. The flow piston 4 is placed in the hydraulic housing 6, in which the check valve 7 is installed, the piston cavity 8 of the hydraulic housing 6 is connected via a check valve to the suction guide pvj; iriMeH y.d stocks cavity 10 with a drop of hydrolysis 11,

The pump operates as follows.

When moving the piston 3 with the yoke-piston 4 in the hydraulic housing 6 upwards, due to the discharge in the cavity 8, the check valve 7 opens, the cavity 8 is filled with liquid from the suction hydraulic line 9 "When the piston 3 with the piston rod 4 returns, the check valve 7 closes , a pressure is created in the cavity 8, which opens the check valve 5, and the liquid through it from the cavity 8 is displaced into the cavity 10. Since the cross-sectional area of the thickening of the piston rod 4 is two times larger than the cross-sectional area of the rod itself, half of the fluid from the cavity 8 goes to is filled cavity 10, and the second half is displaced into the pressure line 11. The next time the piston rod 4 moves up, the check valve 5 closes and the check valve 7 opens. The cavity 8 is again filled with iHAKOCTbn from the suction line 9, while the liquid from the strip 10 is displaced by ITOKOM piston 4 in pressure head hydraulic line 11.

 4 pumps) suction takes place once during the upward stroke, while the fluid is guided to the pressure hydraulic line in uniform doses both during the stroke of the piston 4 upward and downward. This ensures the stability of the fluid supply to the pressure hydraulic line, and the compressed air supplied to move the piston 3 up is consumed to supply the fluid under pressure to the pressure hydraulic line, which increases the pump efficiency.

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Claims (1)

A hydraulic pump with a pneumatic actuator, containing two non-return valves and a pneumatic cylinder with a built-in mechanism for automatically controlling the reciprocating movement of a one-way rod, located in a hydraulic housing connected to the pneumatic cylinder, characterized in that the rod is double-thickened in the form of a piston with a cross-sectional area exceeding the cross-sectional area of the rod, as a result of which a hydraulic cylinder is formed in the hydraulic housing, the piston cavity of which is connected through the non-return valve to ik- hydraulic line, and the rod side is connected to the pressure line and via a check valve mounted in the stem thickening, - a plunger cavity.